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SHARE-BASED COMPENSATION (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
SHARE-BASED COMPENSATION |
Summary of the option activity |
|  |  |  |  |  | Weighted |  |
|  |  |  | Weighted |  | Average |  |
|  |  |  | Average |  | Remaining |  |
|  | Number |  | Exercise |  | Contract |  | Aggregate
|  | of Options |  | Price |  | Terms |  | Intrinsic Value
|  |  |  | $ |  |  |  |  | In Thousands of
|  |  |  |  |  |  |  |  | U.S. Dollars
Options outstanding at January 1, 2018 |  | 369,173 |  | 15.97 |  | 2 | years |  | 2,068
Granted |  | — |  |  |  |  |  |  |
Exercised |  | (74,521) |  | 10.33 |  |  |  |  |
Forfeited |  | (70,150) |  | 41.66 |  |  |  |  |
Options outstanding at December 31, 2018 |  | 224,502 |  | 9.82 |  | 2 | years |  | 1,026
Options vested or expected to be vested at December 31, 2018 |  | 224,502 |  | 9.82 |  |  |  |  |
Options exercisable at December 31, 2018 |  | 224,502 |  | 9.82 |  |  |  |  |
Summary of the RSU activity |
|  |  |  | Weighted Average
|  | Number of |  | Grant-Date
|  | Shares |  | Fair Value
|  |  |  | $
Unvested at January 1, 2018 |  | 1,732,047 |  | 15.42
Granted |  | 759,702 |  | 13.62
Vested |  | (609,418) |  | 16.84
Forfeited |  | (101,060) |  | 15.17
Unvested at December 31, 2018 |  | 1,781,271 |  | 14.18

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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